Howto clone xfs partitions ? (upload and download, multicast)

Is there a way to clone zfs partitions ? It seems fog clones them as RAW, what’s is not the most efficient protocol
I didn’t find anything about that, except a topic from ianabc mentionning a “fog-upload-xfs-support.patch.txt” file you can’t access (no link)
The goal is to download/upload, using multicast